Q.1
Transition elements forms alloys easily because they have ..
  • a) same atomic number
  • b) same electronic configuration
  • c) nearly same atomic size
  • d) all of the above
Q.2
Which form contains the maximum percentage of carbon? [ PET 1990]
  • a) Fe(CO)4
  • b) Fe(CO)5
  • c) Fe(CO)6
  • d) Fe(CO)7
Q.3
Stainless steel does not rust because ... ..
  • a) Nickel present in it does not rust
  • b) Iron forms a hard chemical compound with chromium present in it
  • c) Chromium and nickel combine with iron
  • d) Chromium forms an oxide layer that protects iron from rusting
Q.4
Which one of the following characteristics of the transition metals is associated with their catalytic activity? [ AIMPT 2003]
  • a) Colour of hydrated ions
  • b) Variable oxidation states
  • c) High enthalpy of atomisation
  • d) Paramagnetic behavior
Q.5
Substances which does not react with cold water but react with steam are
  • a) C, Ca, SO2
  • b) Fe, Al Cl2
  • c) CO2 , Na, Mg
  • d) C, Fe, Mg
Q.6
Number of electrons transferred in each case when KMnO4 acts as an oxidizing agent to give MnO2, Mn2+, Mn(OH)3 and MnO42- are respectively ..[ AIEEEE 2002]
  • a) 3, 5, 4 and 1
  • b) 4, 3, 1, and 5
  • c) 1, 3, 4 and 5
  • d) 5, 4, 3 and 1
Q.7
Transition metals in their compounds show
  • a) ioonic bonds
  • b) covalent bonds
  • c) ionic and covalent bonds
  • d) ionic and coordination bonds
Q.8
Cinnabar is an ore of … [ AIPMT 1991]
  • a) Hg
  • b) Cu
  • c) Pb
  • d) Zn
Q.9
Potassium manganite (K2MnOsub>4) is formed when
  • a) Cl2 is passed in to an aqueous KMnO4 solution
  • b) MnO2 is fused with KOH in air
  • c) formaldehyde reacts with KMnO4 in presence of strong alkali
  • d) KMnO4 reacts with concentrated H2SO4
Q.10
The most durable metal plating on iron to protect against corrosion is … [ AIPMT 1994]
  • a) Nickel plating
  • b) Tin plating
  • c) Copper plating
  • d) Zinc plating
Q.11
Which metal sulphide is not black?
  • a) NiS
  • b) CoS
  • c) CuS
  • d) ZnS
Q.12
In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two ( - O – O - ) bonds Oxidation state of Cr in CrO5 is
  • a) +5
  • b) +3
  • c) +6
  • d) -10
Q.13
Calomel reacts with ammonium hydrosixe to form …[ AIEEE 2005]
  • a) Hg(NH2)Cl
  • b) H2N-Hg-Hg-Cl
  • c) Hg2O
  • d) HgO
Q.14
The grey cast iron contains
  • a) Iron carbide
  • b) Silcon carbide
  • c) Silicon dioxide
  • d) Graphite
Q.15
The basic character of the transition metal monoxides follows the order ( At. No Ti=22, V = 23, Cr=24, Fe = 26) [ AIPMT]
  • a) TiO > FeO > VO > CrO
  • b) TiO > VO > CrO > FeO
  • c) VO > CrO > TiO > FeO
  • d) CrO > VO > FeO > TiO
Q.16
Which of the following statements about the interstitial compounds is incorrect? [ NEET 2013]
  • a) They retain metallic conductivity
  • b) They are chemically reactive
  • c) They are much harder than the pure metal
  • d) They have higher melting points than the pure metals
Q.17
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? ( At. nos Cr = 24, Mn = 25, Fe = 26, Co = 27)
  • a) Cr > Mn > Co > Fe
  • b) Mn > Fe > Ce > Co
  • c) Fe > Mn > Co > Cr
  • d) Co > Mn > Fe > Cr
Q.18
In context with the transition elements, which of the following statements is incorrect? [ AIEEE 2009]
  • a) In the highest oxidation states, the transition metal show basic character and form cationic complexes
  • b) In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d-electrons are used for bonding
  • c) Once the d5 – configuration is exceeded, the tendency to involve all the 3d –electrons in bonding decreases
  • d) In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes
Q.19
Most common oxidation states shown by cerium are …[ AIEEE 2002]
  • a) +2, +4
  • b) +3, +4
  • c) +3, +5
  • d) +2, +3
Q.20
What is the atomic number of the element with M2+ ion having electronic configuration [Ar] 3d8 [Gujarat-2009]
  • a) 26
  • b) 27
  • c) 28
  • d) 25
Q.21
More number of oxidation states are exhibited by the actinides than by the lanthanides. The main reason for this is …[ AIPMT 2005]
  • a) More energy difference between 5f and 6d- orbitals than that between 4f anda 5d-orbitals
  • b) Lesser energy difference between 5f and 6d- orbitals than that between 4f and 5d orbitals
  • c) Greater metallic character of the lanthanides than that of the corresponding actinides
  • d) More active nature of the actinides
Q.22
Match Column-A and Column-B properly
Stainless steel a. In reveting
Bronze b. In antic piece
Nitinol c. Nitinol
German silver d. To make surgical appliances
-- -- e. Cu (75-85%) NI (25-15%)
   
  • a) 1 → e;   2 → d;   3 → b;   4 → c
  • b) 1 → e;   2 → d ;   3 → b;   4 → c
  • c) 1 → e;   2 → c;   3 → a;   4 → b
  • d) 1 → e;   2 → c;   3 → a;   4 → d
Q.23
Which of the following processes does not involve oxidation of iron? [ AIPMT 2015]
  • a) Rusting of iron sheets
  • b) Decolourisation of blue CuSO4 solution by iron
  • c) Formation of Fe(CO)5 from Fe
  • d) Liberation of H2 from steam by iron a high temperature
Q.24
Permanent magnets are generally made of alloys of .... ...
  • a) Co
  • b) Zn
  • c) Sb
  • d) Pb
Q.25
Mercury is purified by ..[ PET 1990]
  • a) Solidifying
  • b) Distillation in vacuum
  • c) Treatment with dil. HNO3
  • d) Electrolytic method
Q.26
With decrease in size of cation:
  • a) Complex forming tendency decreases.
  • b) Complex forming tendency increases.
  • c) Complex forming tendency does not change.
  • d) None of these.
Q.27
In the dichromate dianion …[ IIT 1999]
  • a) 4 Cr-O bonds are equivalent
  • b) 6 Cr-O bonds are equivalent
  • c) All Cr-O bonds are equivalent
  • d) All Cr-O bonds are non-equivalent
Q.28
All metal chlorides are soluble in water except those of
  • a) Ag, Pb, Hg
  • b) Na, K, Ca
  • c) Zn, Cu, Cd
  • d) Be, Sr, Li
Q.29
Which will reduce acidified potassium dichromate solution?
  • a) Potash alum
  • b) Mohr’s salt
  • c) Chile saltpeter
  • d) White vitriol
Q.30
Acidified potassium dichromate is treated with hrdrogen sulphide. In the reaction the oxidation number of chromium ..[ PET 1996]
  • a) Increases from +3 to +6
  • b) Decreases from +6 to +3
  • c) Remain unchanged
  • d) Decreases from +6 to +2
0 h : 0 m : 1 s